All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

• Default sync interval changed from 10 seconds to 30 seconds

• Initial release
• Native Flagstack API: Flagstack.enabled?, Flagstack.disabled?, Flagstack.enable, Flagstack.disable
• Actor targeting: Flagstack.enable_actor, Flagstack.disable_actor
• Group targeting: Flagstack.enable_group, Flagstack.disable_group, Flagstack.register
• Percentage rollouts: Flagstack.enable_percentage_of_actors, Flagstack.enable_percentage_of_time
• Feature access: Flagstack[:feature], Flagstack.features
• Health check method (Flagstack.health_check) to verify connectivity to Flagstack server
• Graceful shutdown hooks for Rails applications via at_exit
• Feature flag synchronization from Flagstack to local Flipper adapter
• Background polling for automatic sync (configurable interval)
• Telemetry support for feature flag evaluation metrics
• Support for all Flipper gate types:
  • Boolean (enabled/disabled)
  • Actors (specific users/entities)
  • Groups (named groups)
  • Percentage of actors
  • Percentage of time
• Rails integration via Railtie
• Auto-configuration when FLAGSTACK_TOKEN environment variable is set
• Install generator (rails generate flagstack:install)
• Fork detection for multi-process servers (Puma, Unicorn)
• ETag-based caching for efficient sync
• Offline resilience (reads continue from local adapter if Flagstack is unavailable)

• token - API token (required)
• url - Flagstack server URL (default: https://flagstack.io)
• sync_interval - Polling interval in seconds (default: 30)
• sync_method - :poll or :manual (default: :poll)
• telemetry_enabled - Enable/disable telemetry (default: true)
• telemetry_interval - Telemetry submission interval (default: 60)
• local_adapter - Custom Flipper adapter (auto-detected)
• logger - Custom logger (default: Rails.logger or stdlib Logger)
• read_timeout, open_timeout, write_timeout - HTTP timeouts